<!DOCTYPE html>
<html>
<head>
	<title>draft</title>
</head>
<body>
	<p>呜啦啦啦啦</p>
	<button id="hu">hu</button>
</body>
<script>
	document.getElementById('hu').onclick = () => {
		let myHeaders = new Headers();
		myHeaders.append("Content-Type", "application/json");

		fetch('https://localhost:8443/getLabel',{
			method:'POST',
			headers: myHeaders,
			body: JSON.stringify({a: 'A'})
		})
	}
</script>
</html>